front bucket seats on '68 Barracuda

my bolts were though the central holes... anyway, no biggie, these carriage bolts were held in place with nuts and lock washers vs. being swaged - I added longer ones (3") I got at Lowe's (stainless) and doubled up on the factory style half inch spacers (from e-bay) for the inside tracks and all looks good - surprised that just the additional 1/2" did the trick - if I need more I'll add a bit but this seems to be all that was needed. thanks all again for insights. Nice difference this makes when you jump in either side - just feels right. fwiw